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US2421291A
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Assignee: Sun Chemical Corp
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Filing: 1943-04-02
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Granted: 1947-05-27
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Expires: 1963-04-02
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Schmutzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:57
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1922646A
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GB337199A
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US2115716A
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US2158481A
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GB456898A
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US2157385A
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GB468384A
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US2244103A
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US2285183A
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US2361009A
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US2335882A
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US2346969A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |